1/*
2 * Copyright (c) 1997-2014 Erez Zadok
3 * Copyright (c) 1990 Jan-Simon Pendry
4 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
5 * Copyright (c) 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Jan-Simon Pendry at Imperial College, London.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 *
36 * File: am-utils/amd/ops_pcfs.c
37 *
38 */
39
40/*
41 * PC (MS-DOS) file system
42 */
43
44#ifdef HAVE_CONFIG_H
45# include <config.h>
46#endif /* HAVE_CONFIG_H */
47#include <am_defs.h>
48#include <amd.h>
49
50/* forward definitions */
51static char *pcfs_match(am_opts *fo);
52static int pcfs_mount(am_node *am, mntfs *mf);
53static int pcfs_umount(am_node *am, mntfs *mf);
54
55/*
56 * Ops structure
57 */
58am_ops pcfs_ops =
59{
60  "pcfs",
61  pcfs_match,
62  0,				/* pcfs_init */
63  pcfs_mount,
64  pcfs_umount,
65  amfs_error_lookup_child,
66  amfs_error_mount_child,
67  amfs_error_readdir,
68  0,				/* pcfs_readlink */
69  0,				/* pcfs_mounted */
70  0,				/* pcfs_umounted */
71  amfs_generic_find_srvr,
72  0,				/* pcfs_get_wchan */
73  FS_MKMNT | FS_UBACKGROUND | FS_AMQINFO,	/* nfs_fs_flags */
74#ifdef HAVE_FS_AUTOFS
75  AUTOFS_PCFS_FS_FLAGS,
76#endif /* HAVE_FS_AUTOFS */
77};
78
79
80
81/*
82 * PCFS needs remote filesystem.
83 */
84static char *
85pcfs_match(am_opts *fo)
86{
87  if (!fo->opt_dev) {
88    plog(XLOG_USER, "pcfs: no source device specified");
89    return 0;
90  }
91  dlog("PCFS: mounting device \"%s\" on \"%s\"", fo->opt_dev, fo->opt_fs);
92
93  /*
94   * Determine magic cookie to put in mtab
95   */
96  return xstrdup(fo->opt_dev);
97}
98
99
100static int
101mount_pcfs(char *mntdir, char *fs_name, char *opts, int on_autofs)
102{
103  pcfs_args_t pcfs_args;
104  mntent_t mnt;
105  int flags;
106#if defined(HAVE_PCFS_ARGS_T_MASK) || defined(HAVE_PCFS_ARGS_T_DIRMASK)
107  int mask;
108#endif /* defined(HAVE_PCFS_ARGS_T_MASK) || defined(HAVE_PCFS_ARGS_T_DIRMASK) */
109#if defined(HAVE_PCFS_ARGS_T_UID) || defined(HAVE_PCFS_ARGS_T_UID)
110  char *str;
111#endif /* defined(HAVE_PCFS_ARGS_T_UID) || defined(HAVE_PCFS_ARGS_T_UID) */
112
113  /*
114   * Figure out the name of the file system type.
115   */
116  MTYPE_TYPE type = MOUNT_TYPE_PCFS;
117
118  memset((voidp) &pcfs_args, 0, sizeof(pcfs_args)); /* Paranoid */
119
120  /*
121   * Fill in the mount structure
122   */
123  memset((voidp) &mnt, 0, sizeof(mnt));
124  mnt.mnt_dir = mntdir;
125  mnt.mnt_fsname = fs_name;
126  mnt.mnt_type = MNTTAB_TYPE_PCFS;
127  mnt.mnt_opts = opts;
128
129  flags = compute_mount_flags(&mnt);
130#ifdef HAVE_FS_AUTOFS
131  if (on_autofs)
132    flags |= autofs_compute_mount_flags(&mnt);
133#endif /* HAVE_FS_AUTOFS */
134  if (amuDebug(D_TRACE))
135    plog(XLOG_DEBUG, "mount_pcfs: flags=0x%x", (u_int) flags);
136
137#ifdef HAVE_PCFS_ARGS_T_FSPEC
138  pcfs_args.fspec = fs_name;
139#endif /* HAVE_PCFS_ARGS_T_FSPEC */
140
141#ifdef HAVE_PCFS_ARGS_T_MASK
142  pcfs_args.mask = 0777;	/* this may be the msdos file modes */
143  if ((mask = hasmntval(&mnt, MNTTAB_OPT_MASK)) > 0)
144    pcfs_args.mask = mask;
145  if (amuDebug(D_TRACE))
146    plog(XLOG_DEBUG, "mount_pcfs: mask=%o (octal)", (u_int) pcfs_args.mask);
147#endif /* HAVE_PCFS_ARGS_T_MASK */
148
149#ifdef HAVE_PCFS_ARGS_T_DIRMASK
150  pcfs_args.dirmask = 0777;    /* this may be the msdos dir modes */
151  if ((mask = hasmntval(&mnt, MNTTAB_OPT_DIRMASK)) > 0)
152    pcfs_args.dirmask = mask;
153  if (amuDebug(D_TRACE))
154    plog(XLOG_DEBUG, "mount_pcfs: dirmask=%o (octal)", (u_int) pcfs_args.dirmask);
155#endif /* HAVE_PCFS_ARGS_T_DIRMASK */
156
157#ifdef HAVE_PCFS_ARGS_T_UID
158  pcfs_args.uid = 0;		/* default to root */
159  if ((str = hasmntstr(&mnt, MNTTAB_OPT_USER)) != NULL) {
160    struct passwd *pw;
161    if ((pw = getpwnam(str)) != NULL)
162      pcfs_args.uid = pw->pw_uid;
163    else		 /* maybe used passed a UID number, not user name */
164      pcfs_args.uid = atoi(str); /* atoi returns '0' if it failed */
165    XFREE(str);
166  }
167  if (amuDebug(D_TRACE))
168    plog(XLOG_DEBUG, "mount_pcfs: uid=%d", (int) pcfs_args.uid);
169#endif /* HAVE_PCFS_ARGS_T_UID */
170
171#ifdef HAVE_PCFS_ARGS_T_GID
172  pcfs_args.gid = 0;		/* default to wheel/root group */
173  if ((str = hasmntstr(&mnt, MNTTAB_OPT_GROUP)) != NULL) {
174    struct group *gr;
175    if ((gr = getgrnam(str)) != NULL)
176      pcfs_args.gid = gr->gr_gid;
177    else		/* maybe used passed a GID number, not group name */
178      pcfs_args.gid = atoi(str); /* atoi returns '0' if it failed */
179    XFREE(str);
180  }
181  if (amuDebug(D_TRACE))
182    plog(XLOG_DEBUG, "mount_pcfs: gid=%d", (int) pcfs_args.gid);
183#endif /* HAVE_PCFS_ARGS_T_GID */
184
185#ifdef HAVE_PCFS_ARGS_T_SECONDSWEST
186  pcfs_args.secondswest = 0;	/* XXX: fill in correct values */
187#endif /* HAVE_PCFS_ARGS_T_SECONDSWEST */
188#ifdef HAVE_PCFS_ARGS_T_DSTTIME
189  pcfs_args.dsttime = 0;	/* XXX: fill in correct values */
190#endif /* HAVE_PCFS_ARGS_T_DSTTIME */
191
192  /*
193   * Call generic mount routine
194   */
195  return mount_fs(&mnt, flags, (caddr_t) & pcfs_args, 0, type, 0, NULL, mnttab_file_name, on_autofs);
196}
197
198
199static int
200pcfs_mount(am_node *am, mntfs *mf)
201{
202  int on_autofs = mf->mf_flags & MFF_ON_AUTOFS;
203  int error;
204
205  error = mount_pcfs(mf->mf_mount, mf->mf_info, mf->mf_mopts, on_autofs);
206  if (error) {
207    errno = error;
208    plog(XLOG_ERROR, "mount_pcfs: %m");
209    return error;
210  }
211
212  return 0;
213}
214
215
216static int
217pcfs_umount(am_node *am, mntfs *mf)
218{
219  int unmount_flags = (mf->mf_flags & MFF_ON_AUTOFS) ? AMU_UMOUNT_AUTOFS : 0;
220
221  return UMOUNT_FS(mf->mf_mount, mnttab_file_name, unmount_flags);
222}
223